if you modulate the incoming frequency of an oscillator by plus/minus 200. Hz at a speed equivalent to your current sampling rate, as you have done in this patch of yours, then no, it is not possible to ‘tune’ the oscillator as you ask, because it is being considerably re-tuned all the time!

it is unclear what you are trying to achieve. do you want a subtle noisey oscillator? or do you want to do some sort of ‘modulation’ effect? some quick thoughts:

– Pasted Max Patch, click to expand. –

Copy all of the following text. Then, in Max, select New From Clipboard.

You’re injecting noise into the tuning of the oscillator in your example, and you’re also adding a huge amount of it (±200 to the existing MIDI scaled value! ±1 would be a whole step in either direction from the original tuning) If you just want to add noise, add it after the oscillator (send it to the same object that the oscillator is going to)

You might also consider adding pink noise instead as it won’t be as harsh. (pink~)